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The role of Cebpb in Alcohol-associated Liver Disease development and resolution

ABSTRACT: The role of Cebpb in Alcohol-associated Liver Disease development and resolution

PROVIDER: PRJNA1158711 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR30599169_1.fastq.gz	Fastqsanger.gz
	SRR30599169_2.fastq.gz	Fastqsanger.gz
	SRR30599170_1.fastq.gz	Fastqsanger.gz
	SRR30599170_2.fastq.gz	Fastqsanger.gz
	SRR30599171_1.fastq.gz	Fastqsanger.gz

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The role of Cebpb in Alcohol-associated Liver Disease development and resolution

Project description:Abstinence is an important therapeutic intervention for patients with alcohol-associated liver disease (ALD). However, fibrosis improvement after cessation is not uniform and some patients do not improve. We aimed to use scATAC-seq analysis in a mouse model of ALD to define the mechanism of poor ALD resolution. We analyzed differentially accessible regions in livers from control, ALD, or 4 weeks post alcohol cessation mice and identified transcription factors activated in ALD that remained activated after alcohol withdrawal. The top hit was C/EBPβ. We found that hepatocyte specific Cebpb knockout prevented ALD development, while knockout at the time of alcohol cessation promoted fibrosis resolution.

2024-09-12 | GSE276692 | GEO

Sex specific role of KDM5B demethylase in Alcohol-associated Liver Disease development and resolution

Project description:Alcohol-associated liver disease (ALD) is a major cause of alcohol related mortality. Recently we identified hepatic demethylases KDM5B and KDM5C as important sex-specific epigenetic regulators of alcohol response in the liver. In this study we aimed to study the molecular mechanisms of KDM5-dependent ALD development and resolution. We found that alcohol induces pathological changes in cell-cell communication in the liver that are in part mediated by epigenetic changes in hepatocytes mediated by histone demethylase KDM5B. Using cell type specific knockout mice, we found that KDM5B histone demethylase was a key regulator of alcohol-induced epigenetic changes in hepatocytes. Moreover, it regulated hepatocytes-non-parenchymal cell crosstalk that promoted inflammation and fibrosis development in ALD. This mechanism was specific to females. In males KDM5B deficiency was not sufficient to prevent fibrosis development. In contrast KDM5B demethylase loss promoted fibrosis resolution in both males and females. This mechanism involved changes in hepatocyte-macrophage crosstalk and LXRα activation, which we identified to be critical for the fibrosis resolution process. CONCLUSION: In summary, KDM5B demethylase is a regulator of cell-cell crosstalk involved in disease progression in females and in disease resolution in both sexes.

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Sex specific role of KDM5B demethylase in Alcohol-associated Liver Disease development and resolution

Project description:Sex specific role of KDM5B demethylase in Alcohol-associated Liver Disease development and resolution

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The Integrated "Multiomics" Landscape at Peak Injury and Resolution From Alcohol-Associated Liver Disease

Project description:To investigate the the liver transcriptome at peak injury and during early and late resolution from alcohol-induced liver injury in mice

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Sex specific role of KDM5 demethylases in Alcohol-associated Liver Disease

Project description:Alcohol-associated liver disease (ALD) is a major cause of alcohol related mortality. The specific mechanisms responsible for ALD development and progression are not fully understood, and there is limited therapy for any stage of ALD. Sex differences are often disregarded in in genetic and mechanistic studies. We aimed to take an unbiased approach to define sex specific pathways in livers exposed to alcohol. METHODS: Mice were fed LieberDeCarli alcohol liquid diet for 3 weeks. To identify the role of Kdm5b and Kdm5c we injected mice with AAV-shControl at 2x10^11 gc per mouse or AAV-shKdm5b and AAV-Kdm5c vectors at 10^11 gc per mouse. To assess the role of AhR we injected mice with AAV-shControl or AAV-shAhR vectors at 10^11 gc per mouse. RESULTS: We found several pathways affected by alcohol in sex specific way and identified KDM5 demethylases as contributors to that specificity.

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Sex specific role of KDM5 demethylases in Alcohol-associated Liver Disease

Project description:Sex specific role of KDM5 demethylases in Alcohol-associated Liver Disease

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Alcohol-associated hepatitis induces hepatocyte senescence which is reduced following disease resolution

Project description:Background & Aims: Alcohol-associated hepatitis (AH) is an acute form of alcohol-related liver disease (ArLD) with high mortality rate. AH is histologically characterised by cellular processes including steatosis, inflammation and cell death. Apoptosis is the most studied form of cell death in AH; however, the role of cellular senescence, another response to cellular injury, in AH is unknown. Here we aim to explore the mechanisms of ArLD pathophysiology and define the role of senescence in AH. Methods: We performed RNA sequencing and bioinformatics analysis of transjugular liver biopsies (n=65) from AH patients participating in the ISAIAH clinical trial. We also carried out multiomic analysis of an in vitro hepatocyte model of AH. We also performed additional bioinformatics reanalysis of existing AH transcriptomic datasets. Results: Senescence markers and pathways are increasingly expressed in hepatocytes as ArLD progresses towards AH. We find dysregulation of senescence, inflammation and hepatocyte function is reversed at transcriptomic level following AH resolution. We identify dysregulation of two senescence-associated protein complexes, cytochrome c oxidase and the proteasome, which may act as senescence-induction mechanisms. Our in vitro model reveals senescence induction is a direct effect of ethanol on hepatocytes. Conclusions: Our results show a central role for senescence in AH and suggest senolytics as potential therapeutics in early ALD to limit AH severity.

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Alcohol-associated hepatitis induces hepatocyte senescence which is reduced following disease resolution I

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